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Titanium alloy-stainless steel dissimilar metal laser braze-welding method adopting copper base brazing filler metal

A technology of copper-based solder and brazing method, which is applied in the direction of metal processing equipment, welding equipment, welding/welding/cutting items, etc., to achieve the effects of reducing brittleness, improving microstructure, and improving welding quality

Active Publication Date: 2019-11-08
XINJIANG UNIVERSITY
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  • Abstract
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Problems solved by technology

Although its brittleness is lower than that of Ti-Fe intermetallic compounds, it still increases the risk of brittle fracture of joints

Method used

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  • Titanium alloy-stainless steel dissimilar metal laser braze-welding method adopting copper base brazing filler metal
  • Titanium alloy-stainless steel dissimilar metal laser braze-welding method adopting copper base brazing filler metal
  • Titanium alloy-stainless steel dissimilar metal laser braze-welding method adopting copper base brazing filler metal

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Embodiment Construction

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] Please combine Figure 1-5 , the present invention provides the following technical solutions:

[0027] A titanium alloy-stainless steel dissimilar metal laser brazing method adopting copper-based brazing material is carried out according to the following process steps:

[0028] (1) Joint form: The joint form is I-shaped groove butt joint, the thickness of copper-based solder is 0.2mm, and a certain pre-tightening force is ensured on the stainless steel-copper-based s...

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Abstract

The invention relates to a titanium alloy-stainless steel dissimilar metal laser braze-welding method adopting copper base brazing filler metal, and belongs to the technical field of laser gun welding. Aiming at the problem that a brittle Ti-Fe intermetallic compound is produced in the titanium alloy-stainless steel dissimilar metal welding process, a laser light is adopted as a welding heat source, the copper base brazing filler metal is adopted as an interlayer material, and the formation of the Ti-Fe intermetallic compound in the titanium alloy-stainless steel welding process is avoided through laser braze-welding, so that the brittleness of a connector is reduced, and the performance of the connector is improved. By adopting laser single-pass welding, the high-quality and high-efficiency welding connector of dissimilar metal materials containing stainless steel fusion welding seams and unfused stainless steel and braze-welding seams is obtained. The titanium alloy-stainless steel dissimilar metal laser braze-welding method adopting the copper base brazing filler metal comprises the process steps of assembling and clamping a panel, adjusting a pre-tightening force of a stainlesssteel- copper base brazing filler metal-titanium alloy contact surface, focusing a laser beam on a 1.5mm part of a stainless steel plate for welding, and realizing the connection of titanium alloy-stainless steel dissimilar metal.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a titanium alloy-stainless steel dissimilar metal laser brazing method using copper-based solder. Background technique [0002] Titanium and its alloys have been widely used in various industrial fields due to their advantages of high strength, high toughness, low density, high temperature resistance and good corrosion resistance. However, the high cost of titanium alloys, poor weldability, poor processability, and poor creep resistance limit the application of titanium alloys. Stainless steel is currently the most commonly used structural material. It has a series of excellent properties, such as weldability, wear resistance, and mechanical properties, and its cost is relatively low. If titanium alloy and stainless steel are connected together by welding, the welded structure of titanium alloy and stainless steel combines the good weldability of stainless steel with the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/00B23K1/005B23K103/24
CPCB23K1/0008B23K1/0056B23K2103/24
Inventor 张岩周建平陈言坤高一迪毕元波
Owner XINJIANG UNIVERSITY
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